1991/06/17 Caterpillar

New Seal And Improved Plate Eliminate Leaks In BrakeSaver Water Lines Group{1380,1155}

Usage:

3406B Truck Engines Equipped With BrakeSavers

Reference: Service Magazine; December 26, 1988; Page 6; "New Screw Used In BrakeSaver Water Lines Group" for 3406B Truck Engines Equipped with BrakeSavers.

Description of Change: A new seal and improved plate assembly are used in the BrakeSaver water lines group. The plate assembly includes an O-ring groove in which the new seal is installed. The new seal and improved plate assembly will help eliminate leaks.

Adaptable To: The new 8M5249 Seal (1), part of the 4P8766 Plate Assembly and the 4W5184 Water Lines Group, is used in place of the former 6V6640 Gasket Maker and 9N0621 Plate. The improved plate assembly is effective with 3406B...2EK860, 3ZJ6036 Truck Engines.

The improved 4P8766 Plate Assembly (2) is adaptable to earlier engines. Also, former 9N0621 Plates can be modified to except the new seal. See Illustrations 2 and 3.

Illustration 1. Location of seal and plate.

Illustration 2. Section A-A. Seal groove diameter.

Illustration 3. Detail B. Groove dimensions.

Caterpillar Information System:

1991/06/17 New Three-Ring Pistons And New Rings Used In New Piston And Rod Groups To Provide Improved Oil Control{1214,1215}

1991/06/10 1,1,1-Trichloroethane May Damage Deutsch C-E Electrical Connectors{1400,0645,0785,1450,1550,1900,3168,3225,3418,4294,4323,4450,5485,5700,7400,7450}

1991/06/10 New Timing Specifications For 3500 Spark-Ignited Engines{1552}

1991/06/03 New Oil Drain Assembly Used; Be Sure To Correctly Tighten Drain Plugs, Port Plugs, And Pipe Plugs In Oil Pans{1302}

1991/06/03 Reference Emissions Graph Helps Determine Oxides Of Nitrogen{1050}

1991/06/03 New Deutsch HD-10® Electrical Connectors Used{1400,1408}

1991/05/27 New Fuel Manifolds And Clamps Reduce Vibration Of Fuel Lines{1252,1702}

1991/05/27 Smaller Connecting Rod Bolt Used In 4W6425 Air Compressor; Use Correct Torque{1803}

1991/05/27 Technical Marketing Information (TMI) System for Commercial Engine Products{0337,0334,0336}

1991/05/27 Expected Future Air Conditioning Service Requirements{7320,1802}

1991/05/20 Correct Testing of Sensing Switches{7400,7402,7422}

1991/05/20 New Speed Setting Clutch Group For 3161 Woodward Governors{1265}

1991/06/17 Personality Modules For 1991{1902}

1991/06/17 New Gasket Used In Flywheel Housing Cover Group{1157}

1991/06/17 New Top Piston Ring Improves Wear Resistance{1215}

1991/06/24 Air Starter Relay Valve Improved{1462}

1991/06/24 New Flame Arrestor Assembly Used In Flame Arrestor Group{1050}

1991/06/24 New Aftercooler Core Assembly With Increased Corrosion Resistance Available As An Attachment For Landfill Applications{1064}

1991/06/24 Correct Adjustment And Installation Procedure For Engine Speed Timing Sensor{1912}

1991/07/01 New Thermostatic Switches Used In Air Conditioning Systems{7320}

1991/07/01 New Exhaust Manifold Gasket Available{1059}

1991/07/01 Larger 7N1308 Secondary Air Filter Can Be Used In Place Of 1P8482 Secondary Air Filter{1054}

1991/07/08 Caterpillar Original Equipment White And Yellow Paint Is Available In Aerosol Cans For Touch-Up Purposes{0652,7559,7581}

1991/07/08 Dowel Hole Removed From 8N3946 Governor Housing Improves Service Life{1287}